Solder



Patented Au 1', 1939 i UNITED STATES PATENT OFFICE sown. GiorgioPurksrdhofer and Gnaltiero Bsttllans,

by direct and mesne Trieste, Italy, alllgnors,snignmentaottwo-thirdstoorestesDeMsr- P I tini, New YorhN. 1., andone-third to listthewl'aiisca,l

7 'No Application January 1s, ms,

l'lnl No. 185,55. In Italy January 2., 1937 1 Claim. (01. 75-134) Thisinvention relates to new and useful improvements in metal alloys andmore particularly it pertains to a new and novel alloyintended for maybesoldered to aluminium, or to other'light' alloys, or other metals andtheir alloys; W thout necessitating the use of 15 electric arc welding.

' The new alloy herein set forth consists of the following. metalscombined in substantially the proportions given:

2 Bismuth v 10 Zinc 4: 1m I ma 3 as Cadmium a 3,95

a Silver 0.06

It is a further object oi the invention to prooxy-acetylene name .or

Percent v llheilloyisobtainedbyaprogreisive-msion oi the several metalsheretofore mentioned. The

alloy is purified by adding thereto, chloride of ammonia, borax andcolophony-resin, these puritying agents'being added during the fusion ofthe several metals.

While in the foregoing description, certain deilnite quantities of theseveral metals employed have been mentioned, it is to be understood,however, that these quantities may be varied within certain latitudes inorder to produce a soldering alloy for certain speciiicipurposesasparticularly where stronger or weaker soldered joints are desired. a

Having thus describg claimed as new and w t it is desired to'obtain byLetters Patent or the States of Amcr- .ica.is: 4

minium and light alloys in general, both together as well .as with othermetals and their alloys,

consisting of the following percentage oi metals,

' VII: bismuth 10%, sincflq tin 22%. lead 23%,

cadmium 2.95%. silver (i055- varortciro .waxsannoraa. dun-mo Barman.

the. inventiom'what is I" lletall'icalloy mum m the solderlns oi alu-

